Boring tool



D. R. sHmAs June 11, 1929.

BORING TOOL Filed March 29, 1927 gnue'ntoz 11115 hir'as Patented June 11, 1929.

'nnrrsn era-res DAVID R. SHIRAS, OF PITTSBURGH, PENNSYLVANIA.

BotaIne 'roon.

Application filed March 29, 1927. Serial No. 179,290.

This invention is a tool to facilitate the installation of the silage-ejecting device d sclosed in Letters Patent, No. 1,543,525, issued to me June 23, 1.925. In said patent,

there is disclosed a mechanism for ejecting silage from a silo and consisting of a shaft supported in the lower end of the siloand equipped with propellers whereby rotation of the shaft will eject the silagethrough the usual discharge opening formed in the side of the silo. In building new silos, it 18 a simple matter to install thesaid silage e]ecting mechanism but some difficulty has been found in applying said ejecting mechanism. to silos already existing and in use, and the object of the present invention isto provide a simple and inexpensive tool which may be easily operated to cut through stored silage and permit removal of a portion of thesame so as to provide a space in which the e ector may be inounted. The invention is illustrated in the accompanying drawing and will be hereinafter fully set forth.

In the drawing:

Figure l is a sectional elevation showing the lower end of a filled or partially filled silo with my improved tool applied thereto in operative position, and

Fig. 2 is a detail perspective view of the tool removed from the silo.

The silo, indicated at 1, may be of any approved type and is shown as provided with an opening 2 at one side to accommodate the bearing for the silage-ejecting shaft and at a diametrically opposite point with a discharge opening 8, the discharge opening in practice being normally coveredby an air-tight door which has been omitted from the drawing in order to more clearly illustrate the present invention. My improved boring tool consists of a cylindrical tube lof proper diameter to be inserted through the discharge opening 3 and lit closely but rotatably therein. This tube 4- is provided at one end, which is the outer end when the device is in use, with openings 5 through which a lever member 6 maybe engaged to impart turning movement to the tube. The opposite end of the tube is sharpened so that it will readily cut through the silage and it may be equipped with teeth 7 in the manner of a circular saw. lVh ile I have shown ell) these teeth, however, it is to be understood that the device will operate eiiiciently with teeth as I believe the action is more rapid.

the edge merely'sharpened, but I prefer the- The tube is also provided with a longitudinal slot 8 opening through the ends of the tube for a purpose which will presently ap pear. The tube will ordinarily be constructed of material which will retain its form and any tendency to expand will be resisted by the wall of the opening through which it is inserted and by the pressure of the silage at its sides. If preferred, however, a web of material may be left across the outer end of the" slot. When the device is in use, the outer portion thereof may be supported in any desired manner, as by a prep 9, placed a suitable distance from the silo and upon which the tool may rest so that it will be supported with'its axis at a right angle to the vertical axis of the silo. i

It will be understood that silos are usually builtwith the discharge opening 3 but ordinarily without the opening 2. It will also be understood that withdrawing silage by pulling or raking it through the discharge opening is laborious and unsatisfactory and that the ejecting mechanism disclosed in my aforesaid Letters Patent effects discharge of the desired quantity of silage easily, rapidly and without wasteful scattering. It will be now assumed that it is desired to install the ejecting mechanism in a silo which is not equipped with any ejecting mechanism and is filled or partially filled with silage. The opening 2 is bored in the wall of the silo at a point diametrically opposite the discharge opening, its location being preferably determined by external ,n'ieasurcment before the cutting tube 4; is brought into service. The tubular boring tool. is placed with its cutting-end in the discharge opening 3 and its outer portion may be supported by a prop 9. Sufiicient force is applied to the lever 6 to turn the tool and cause it to cut through the silage and this operation is continued until the tool abuts the far wall of the silo. The lever handle 6 may then be withdrawn so that the core of silage which has been taken into the tube may be drawn out in any convenient manner through the slot and the outer end of the tube. The tube will now be serving as a support for the remaining silage and its interior will be clear. If the slot 8 is not then at the bottom of the tool, the tool is given a part rotation so as to bring the slot into the lowest position, whereupon the silage-ejecting shaft with the propelling ejectors thereon and a proper supporting bracket may be inserted endwise through the outer end of the tool and placed in the proper position in the S110,

vwith the end of the shaft projecting through the opening 2 to be equipped with a crank or other operating element and the bearing bracket passing through the slot to rest on the bottom oi the silo. The Cllfill ter of the boring; tool will be such that sutiicient accessibilily will be furnished to permit securing. devices to be nninipulated wl'i'ereby themay be quickly obtained by operation ot the ejector. In withdrawing the tool, the longitudinal slot obviously permits the tube to slide past the bearing bracket to the ejector.

From the foregoing description, it Will be seen that I have provided an exceedingly simple, inexpensive and convenient tool whereby a silage ejector may be installed in a silo which is in use. p

' Having. thus described the invention, I claim: 7 Y

A boring tool for use in placing anejector in filled silo he 'ing a discharge opening and u diametrically opposite opening to receive the eject-or shaft, said tool consisting 0t ecylindricul tube adapted to rotntzibl'y fit within the discharge opening of the silo and open at bothends with its leading end forming a silage cutter and constructed zit its trailing end to be engaged by e turning element and having longitudinal slot openingthrough its leading end Whereoy to per init emplacement of en ejector in the silo.

and Withdrawal of the tool past the ejector to leave the e ector 1n the silo.

In testimony whereof l afiix niy netur 0. DAVID R. SHIRAS. LL. 5.] 

